CITROEN DS3 Owner's Handbook Manual page 204

Putting the wheel back in place
Put the wheel back in its housing.
Unscrew the yellow central bolt by a
few turns then place it in the centre of
the wheel.
Tighten fully until the central bolt clicks to
retain the wheel correctly.
Put the box back in place in the centre of
the wheel and clip it.
Put the polystyrene storage box back
in place.
Refit the boot floor carpet by lightly
folding it in the middle (refer to the section
"Fittings - § Storage box").
On vehicles equipped with a "space-
saver" type spare wheel, the punctured
wheel can be stowed in place of the
"space-saver" wheel; however the boot
floor will not then be flat.